Preparation method of vanadium phosphorus oxide catalyst

A catalyst, vanadium phosphorus oxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve problems such as affecting the content of active components of catalysts, affecting product quality, and shortening the service life of catalysts

Active Publication Date: 2017-07-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In order to achieve a better binding effect, more binders are added to the catalyst powder, which affects the content of catalyst active components;
[0005] 2. Part of the binder decomposes, burns or generates other impurities at high temperature (the reaction temperature is usually 380-450°C during the reaction), which affects the activity

Method used

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Examples

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Effect test

preparation example Construction

[0013] The embodiment of the present invention provides a method for preparing a vanadium phosphorus oxygen catalyst, the method comprising the following steps:

[0014] The invention provides a kind of preparation method of vanadium phosphorus oxygen (VPO) catalyst, described method comprises the steps:

[0015] S01: Preparation of vanadyl orthophosphate hemihydrate (VOHPO) doped with metal additives 4 0.5H 2 O) catalyst precursor powder, the metal additive is at least one of Fe, Mo, Co, Ce, Zr, Nb, Ni, and the molar ratio of the metal additive to vanadium is 0.06 to 0.15;

[0016] S02: Mix the catalyst precursor powder with a binder and auxiliary materials, and obtain the vanadium phosphorus oxygen catalyst by extrusion or tablet molding, wherein the binder is phosphoric acid, pyrophosphoric acid, trimethyl phosphate, At least one of triethyl phosphate, aluminum dihydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, zinc phosphate, tricalcium...

Embodiment 1

[0023] A kind of preparation method of vanadium phosphorus oxygen catalyst, comprises the steps:

[0024] Add 50 g of V to a 1000 mL three-neck flask with mechanical stirring and spherical reflux 2 o 5 , and then added 100 mL of benzyl alcohol and 400 mL of isobutanol. The suspension was heated to 110°C with an oil bath at a certain stirring rate and refluxed for 10h to V 2 o 5 to restore. Then, continue to cool the solution to 40°C under stirring, add (NH 4 ) 6 Mo 7 o 24 4H 2 O 2.60g, Fe(NO 3 ) 3 9H 2 O 2.20g, Ce(NO 3 ) 3 ·6H 2 O reagent 0.85g, Nb(HC 2 o 4 ) 5 ·xH 2 O hydrated niobium oxalate reagent 1.50 g and 46 mL of concentrated H with a mass fraction of 85% 3 PO 4 , and the temperature was raised to 110°C to continue the reaction for 24h. The blue mixed solution obtained after the reaction was suction-filtered with a Buchner funnel, washed with ethanol and deionized water, and suction-filtered again. The obtained powder was dried overnight in a blas...

Embodiment 2

[0027] A kind of preparation method of vanadium phosphorus oxygen catalyst, comprises the steps:

[0028] Add 50 g of V to a 1000 mL three-neck flask with mechanical stirring and spherical reflux 2 o 5 , and then added 100 mL of benzyl alcohol and 400 mL of isobutanol. The suspension was heated to 110°C with an oil bath at a certain stirring rate and refluxed for 10h to V 2 o 5 to restore. Then, continue to cool the solution to 60°C under stirring, add (NH 4 ) 6 Mo 7 o 24 4H 2 O 2.60g, Fe(NO 3 ) 3 9H 2 O 2.20g, Ce(NO 3 ) 3 ·6H 2 O reagent 0.85g, Nb(HC 2 o 4 )5 ·xH 2 O hydrated niobium oxalate reagent 1.50 g and 46 mL of concentrated H with a mass fraction of 85% 3 PO 4 , and the temperature was raised to 110°C to continue the reaction for 24h. The blue mixed solution obtained after the reaction was suction-filtered with a Buchner funnel, washed with ethanol and deionized water, and suction-filtered again. The obtained powder was dried overnight in a blast ...

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Abstract

The invention relates to the technical field of industrial catalysis, and provides a preparation method of a vanadium phosphorus oxide catalyst. The method comprises the following steps: preparing a metal assistant-doped oxovanadium hydrogenphosphate hemihydrate catalyst precursor powder, wherein the metal assistant is at least one of Fe, Mo, Co, Ce, Zr, Nb, and Ni, and a molar ratio of the metal assistant to vanadium is 0.06 to 0.15; and mixing the catalyst precursor powder with a binder and an auxiliary material, and carrying out strip extrusion or tabletting molding to obtain the vanadium phosphorus oxide catalyst, wherein the binder is at least one of phosphoric acid, pyrophosphoric acid, trimethyl phosphate, triethyl phosphate, aluminum dihydrogen phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, zinc phosphate, tricalcium phosphate, ammonium phosphate, ammonium pyrophosphate and ammonium hexametaphosphate, the auxiliary material is at least one of graphite, carbon nanotubes, graphene and carbon powder, and a mass ratio of the catalyst precursor powder to the binder to the auxiliary material is 100:(0.1-15):(0.1-10). The preparation method of vanadium phosphorus oxide catalyst is simple and has no special requirements of production devices, and the obtained catalyst has the advantages of high strength, good catalytic effect, and facilitation of industrial production and application.

Description

technical field [0001] The invention belongs to the field of chemical catalysis, and in particular relates to a preparation method of a vanadium phosphorus oxygen catalyst. Background technique [0002] Maleic anhydride (referred to as maleic anhydride) is an important organic chemical raw material, widely used in unsaturated resins, coatings, food, pesticides, medicine, textiles and other fields. The current mainstream production method is the n-butane oxidation method. Compared with the widely used benzene oxidation method, this method has the characteristics of low raw material cost, low toxicity, high atom economy, and the production process is more environmentally friendly. The benzene oxidation method is similar and can be directly modified on the original device. [0003] However, the vanadium phosphorus oxygen VPO catalyst used in this method is generally made of safflower powder, pseudoboehmite, starch, and water-soluble resin as binders, and is formed by extrusion...

Claims

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Application Information

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IPC IPC(8): B01J27/199B01J35/02C07D307/60
CPCB01J27/199B01J35/026C07D307/60
Inventor 刘瑞霞张锁江李自航张瑞锐贺滨张军平陈嵩嵩
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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